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Barangan banana (Musa acuminata L.) is a plant that has the biggest contribution to national fruit production. The increasing demand for the banana requires the availability of seedlings, while conventional cultivation is unable to produce healthy, disease-free seedlings in a short time and large amount. In vitro culture is considered to be able to handle the constraints of the conventional seed supply. The purpose of this study was to determine the effect of foliar fertilizers on in vitro multiplication of barangan bananas. The method used was a single factor of Completely Randomized Design (CRD), the addition of leaf fertilizer consisting of five levels of media treatment, media MS (control), and 0.50 ml L-1 (p1); 0.75 ml L-1 (p2); 1.00 ml L-1 (p3); 1.25 ml L-1 (p4); 1.50 ml L-1 (p5) of leaf fertilizer media repeated five times. The data were analyzed with Analysis Variance then followed by Duncan Multiple Ranged Test of 5%. The results showed MS media still gave the best results compared to other leaf fertilizer media. Meanwhile, the leaf fertilizer media used in this study still gave good results on the initial time of buds appearance (p3 treatment), the number of shoots and the number of leaves in the p5 treatment, as well as the height of the plant in the p4 and p5 treatments. Therefore, the leaf fertilizer can be used to substitute MS media

The study aims to analyze the differences in the development of corn cultivation in peat soils between no-burning and traditional methods or with burning in Rasau Jaya District, Kubu Raya District. The fact that currently clearing forests is still using burning on agricultural land in general and especially on peat soil that is feared to experience underground burning is difficult to overcome and cause many losses. The development of corn on land without burning on peat soil is a solution for the community in maintaining ecosystem sustainability. The explanatory research is directed at testing hypotheses and following research objectives. Data collection by interview and questionnaire to 60 respondents were corn farmers on peat soil. The average difference test is used in explaining the difference in yield between the two methods of planting on peat soil. The results found that there were significant differences in the application of corn cultivation on peat soil without burning compared to the traditional method on the variables fertilizer, pesticide, business costs, and yields. In contrast, the planting area variable had no significant difference.

Genetic enhancement in vegetatively propagated crops can be done through mutation induction. Colchicine-induced mutation is one of the methods that can be employed to increase plant genetic diversity. This study aimed to determine the effect of colchicine on the performance and genetic parameters of MV3 generation of Plectranthus amboinicus (L.). This study was conducted at the Laboratory of Agricultural Seed Management, Plantation Research and Development Center, from June 2018 to June 2019. Nodes and shoots were used as explants. Mutation induction was performed using colchicine at concentrations of 0%, 0.02%, 0.04%, and 0.06%. Explant regeneration and subculture were done on MS0 medium. The number of plantlets yielded were 59 (0% concentration of colchicine), 60 (0.02%), 81 (0.04%), and 80 plantlets (0.06%), respectively. Results indicated that colchicine-induced mutation in an in vitro culture was able to generate high genetic diversity in both quantitative and qualitative characters of the plantlets. At the concentration of 0.04%, colchicine produced the highest frequency of putative mutants (28.4%). Genetic parameters in MV3 generation of P. amboinicus plantlets showed that five quantitative characters, i.e. plantlet height, number of leaves, number of shoots, leaf length, and number of roots had high heritability values at a concentration around the LC50 value (0.0275%).

Produksi tanaman lada tidak sejalan dengan upaya ekstensifikasi dan intensifikasi pemerintah, hal ini disebabkan masih banyaknya infeksi penyakit pada tanaman lada bahkan cenderung bertambah baik dari jenis penyakit maupun intensitas infeksi penyakitnya. Informasi mengenai perkembangan penyakit tanaman lada di area centra produksi lada yang jarang diperbaharui. Penelitian ini dilakukan untuk mengamati dan menentukan kejadian dan keparahan penyakit tanaman lada menggunakan metode purposive samping. Hasil penelitian ditemukan 3 jenis penyakit yang menginfeksi tanaman lada di Kabupaten Bangka Selatan, yaitu penyakit kuning, busuk pangkal batang dan kerdil virus. Tingkat kejadian dan keparahan penyakit relatif lebih tinggi terjadi di Kecamatan Tukak Sadai. Kejadian penyakit kuning lada, penyakit busuk pangkal batang, dan penyakit virus berkisar 3,33-90,48 %; 43,70 %; dan 12,5-100 %, secara berturut-turut. Keparahan penyakit busuk pangkal batang mencapai 43,11 % dan penyakit virus berkisar 4,58-59,57 %. White pepper production is not in line with the government's extensification and intensification efforts, these are due to disease infection in the pepper plant that tends to increase. Information about disease progression of black pepper plants in production center areas is rarely updated. This research was conducted to observe and determine incidence and severity disease of the black pepper plantations by using the purposive sampling method. The results of the study found three types of disease that infected on black pepper plantations in the South Bangka Regency, namely yellow disease, stem rot disease, and viral disease. The incidence and severity disease are relatively higher in the Tukak Sadai District than others. The incidences of yellow disease, rot stem disease, and viral disease about 3,33 to 90,48 %; 0 to 43,70 %, and 12,5 to 100 %, respectively. The severity of rot stem disease until 43,11 %; and viral disease about 4,58 to 59,57 %.

Java turmeric (Curcuma xanthorrhiza Roxb.) is cultivated as a secondary crop, resulting in variable rhizome quality which can be increased by suitable cultivation methods. This study investigated the effect of different cultivation methods on the rhizome yield of Java turmeric. Different fertilizer treatments(none, organic, inorganic, and semi-organic fertilizer), three groups of rhizome seed size (small (50–80 g), medium (100–150 g), and large (200–250 g)) and three groups of harvesting age (eight, ten, and twelve months after planting) were evaluated in a split plot design experiment. Results show that large rhizome seed size together with organic fertilizer treatment increased secondary rhizome production, yielding the highest number, weight and diameter. As high levels of starch in the primary rhizome are crucial for growth of the plant, the use of large rhizomes for propagation is indicated in Java turmeric cultivation. The highest weight and number of primary rhizomes were yielded when plants were harvested twelve months after planting.

The diversity of genetic material determines the success of cocoa production. improvement and breeding programs. Enrichment of genetic material for Bangka cocoa can be achieved through exploration and characterization of morphological features or characters of accessions, clones, and/or varieties. To determine the level of diversity of qualitative and quantitative traits. Morphological exploration and characterization was aimed at identifying the diversity of Bangka cocoa as an effort to increase the efficiency of utilization of local genetic material. The research used survey, and direct characterization (purposive sampling). Exploration to obtain a cocoa plant passport consists of accession number, accession name, location of origin, owner's name, age of plant, and land area. Characterization to obtain the identity of qualitative and quantitative characters from leaves, flowers, fruits, and seeds refers to “The Systematic Description of Cacao Clones. The results of the exploration-characterization obtained 29 accessions of cocoa from Bangka, which had very diverse morphological characters. Diversity is evidenced by wide phenotypic variability even though it has narrow genetic variability, and the similarity level of some accessions is quite low, namely <50%. Keragaman materi genetik menentukan keberhasilan peningkatan produksi dan program pemuliaan kakao. Pengayaan materi genetik kakao rakyat Bangka dapat ditempuh melalui ekplorasi dan karakterisasi ciri atau karakter morfologi dari aksesi, klon, dan/atau varietas.untuk menentukan tingkat keragaman sifat kualitatif maupun kuantitatif. Eksplorasi dan karakterisasi morfologi. ditujukan untuk identifikasi keragaman kakao Bangka sebagai upaya meningkatkan efisiensi pemanfaatan materi genetik lokal. Penelitian menggunakan metode survei dan karakterisasi secara langsung (purposive sampling). Eksplorasi untuk memperoleh passport tanaman kakao terdiri dari nomor aksesi, nama aksesi, lokasi asal, nama pemilik, umur tanaman dan luas lahan. Karakterisasi untuk memperoleh identitas karakter kualitatif dan kuantitatif dari daun, bunga, buah, dan biji mengacu pada “The Systematic Description of Cacao Clones”. Hasil eksplorasi-karakterisasi mendapatkan 29 aksesi kakao rakyat Bangka yang memiliki karakter morfologi sangat beragam. Keragaman dibuktikan dengan variabilitas fenotipe yang luas meskipun memiliki variabilitas genetik sempit, serta tingkat kemiripan sebagaian aksesi cukup rendah yaitu < 50 %.

Kerebahan menyebabkan penurunan produksi tanaman padi. Tanaman padi tahan rebah dapat dihasilkan dari kegiatan pemuliaan tanaman. Tujuan penelitian adalah seleksi galur F4 tahan rebah. Penelitian dilaksanakan pada bulan Desember 2018 hingga Mei 2019 di lahan ultisol, Kabupaten Bangka, Provinsi Kepulauan Bangka Belitung. Penanaman galur dilakukan secara single plant. Metode seleksi yang digunakan adalah seleksi pedigree. Hasil penelitian menunjukkan bahwa karakteristik galur F4 padi terseleksi memiliki tinggi tanaman kurang dari 90 cm. Terdapat 70 galur F4 terseleksi memiliki ketahanan rebah berdasarkan karakter tinggi tanaman dan didukung oleh karakter diameter batang, panjang malai, kekuatan batang, dan berat biji bernas per rumpun. Lodging of the paddy plants causes a decrease in rice plant production. Lodging resistants rice plants can be produced through plant breeding. The purpose of the research is selection lodging resistant F4 lines. The research was carried out from December 2018 to May 2019 in the ultisol field, Bangka Regency, Bangka Belitung Province. The F4 lines were planted by a single plant design. Plants were selected using the pedigree method. The result showed that the characteristics of rice F4 lines from crossed were less than 90 cm of height and 70 selected F4 lines seemed to have lodging resistance based on the plant height character and also supported by stem diameter, panicle height, stem strength, and pithy seeds weight per clump.

Beberapa penelitian mengenai pati sekoi telah dilakukan, namun belum ada metode yang direkomendasikan untuk isolasi pati sekoi. Dalam penelitian ini, dilakukan isolasi pati sekoi varietas lokal Bengkulu, menggunakan basa NaOH dengan 1x, 2x dan 3x siklus, menggunakan hexan-NaOH, dan dibandingkan dengan isolasi menggunakan aquadest. Tujuan penelitian adalah untuk menentukan metode isolasi pati sekoi yang menghasilkan pati dengan kemurnian tinggi, mempelajari sifat fisikokimia dan morfologinya. Penelitian ini dilakukan menggunakan rancangan acak lengkap dengan metode isolasi sebagi faktornya. Hail penelitian menunjukkan bahwa metode isolasi pati sekoi dengan NaOH 0,3% 3 siklus, menghasilkan pati sekoi dengan kadar pati dan amilosa tertinggi, yakni 83,15%, dan 19,87%. Kadar air, kadar abu, kadar protein, kadar lemak dan kadar serat kasar pati sekoi tersebut berturut-turut adalah 8,48%, 0,47%, 4,60%, 0,09% dan 0,22%. Suhu gelatinisasi, peak time, viskositas, dan nilai break down viscosity berturut-turut adalah 78 oC, 7,6 menit, 4228 cp, dan 2738 cp. Pati ini memiliki kecerahan (L*) paling tinggi dan bentuk granula pati polygone. Several research on foxtail millet starch have been studied, but there is no recommended method for isolation of foxtail millet starch. In this study, isolation of Bencoolen foxtail millet starch, using sodium hidroxyde with 1x, 2x and 3x cycles, hexane-Sodium hydroxide treatment, and destilled water were done. The purpose of this study were to determine isolation method of Bencoolen foxtail millet starch which minimum impurities, pasting and morphological properties. This research was conducted with a randomized complete design with isolation method as a factor. The result of this study shown that method of starch isolation with NaOH 0.3% three cycle, produces the highest of starch and amylose content were 83.15% and 19.40%. The moisture, ash, protein, fat and crude fiber content of foxtail millet starch were 8.48%, 0.47%, 4.45%, 0.09%, and 0.21%, respectively. The gelatinization temperature, peak time, viscosity, and break down viscosity value of this starch were 78 oC, 7.6 minutes, 4228 cp, and 2738 cp, respectively. It has the highest brightness (L*), and polygonal shape of starch granule.

Kabupaten Bangka Tengah merupakan salah satu kabupaten penghasil jeruk manis di Provinsi Kepulauan Bangka Belitung. Salah satu hama penting tanaman jeruk manis adalah lalat buah (Diptera: Tephritidae). Penelitian ini bertujuan untuk mempelajari keanekaragaman Lalat buah (Diptera: Tephritidae) di pertanaman jeruk manis di Kabupaten Bangka Tengah, Bangka Belitung. Lalat buah dikoleksi dengan perangkap Lynfield trap yang dipasang di tiga desa penghasil jeruk manis di Kabupaten Bangka Tengah. Jenis atraktan yang digunakan untuk memerangkap lalat buah jantan yaitu metil eugenol dan cue lure. Lalat buah yang terkoleksi selama penelitian sebanyak 4795 individu, 3 genus, dan 14 spesies. Lalat buah yang dikoleksi dari perangkap atraktan metil eugenol teridentifikasi berbeda dengan lalat buah yang terperangkap dengan atraktan cue lure. Spesies lalat buah paling banyak ditemukan di desa Terentang sebanyak 13 spesies, dan di desa lain masing-masing ditemukan 9 spesies lalat buah. Bactrocera carambolae dan B. dorsalis merupakan spesies lalat buah dominan di tiga lokasi penelitian. Central Bangka Regency is one of central orange production in Bangka Belitung Islands Province. One of the important pests of sweet orange plants is fruit flies (Diptera: Tephritidae). This research aimed to study the diversity of fruit flies (Diptera: Tephritidae) on sweet orange plantations in Central Bangka Regency, Bangka Belitung Islands Province. The fruit flies were collected using Lynfield traps which installed in three villages producing sweet oranges in Central Bangka Regency. The types of attractants used to trap male fruit flies are methyl eugenol and cue lure. The fruit flies collected during the study were 4795 individuals, 3 genera, and 14 species. Fruit flies collected from the methyl eugenol were different compared to those collected using lure attractant trap. Most species (13 species) of fruit fly were found in Terentang village, and the rest was same (9 species). Bactrocera carambolae and B. dorsalis were the dominant fruit fly species in the three research locations.

Foxtail millet has the potential to be developed as a healthier food alternative because of its high nutritional value. Disease such as leaf blight caused by Bipolaris setariae is one of the limiting factors in Foxtail millet productivity. One of the efforts to control the pathogen is by utilizing resistant varieties. In this study, two candidate varieties and two germplasm accessions were tested to determine the level of resistance to Bipolaris setariae leaf blight. The study was arranged based on a complete randomized design with six replications. Each test material was inoculated with the spore suspension at 4 WAP. Disease intensity was observed based on the disease scoring at 7, 9, and 11 WAP. AUDPC value is calculated based on the intensity of the attack at a particular observation time. Grain weight was recorded and statistically analyzed. The two candidate varieties of foxtail millet Pagamogo and Tedamude from Nagekeo Regency showed a moderately resistant response to leaf blight and had the lowest AUDPC values of 907.69 and 912.31. The highest increase in AUDPC values was observed in the initial observation period at 0-49 DAP.